Urethane-modified isocyanurate foams having enhanced physical pr

Details Urethane-modified isocyanurate foams having enhanced physical pr Urethane-modified isocyanurate foams having enhanced physical pr

1976-12-20

1978-12-12

Ivy, C. Warren

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521116, 521126, 521129, 521174, 521901, 521902, C08G 1848, C08K 332

Patent

active

041296931

ABSTRACT:
Urethane-modified isocyanurate foams are prepared by catalytically condensing an organic polyisocyanate in the presence of a polyol and from 5% to 50% by weight based on the weight of the organic polyisocyanurate of an ammonium phosphate. The resulting foams are characterized by improved flame retardancy and strength properties.

REFERENCES:
patent: 3134742 (1954-05-01), Wismer
patent: 3673128 (1972-06-01), Hayash
patent: 3681273 (1972-08-01), Kelly
patent: 3793236 (1974-02-01), Ashida
patent: 3849349 (1974-11-01), Frisch
patent: 3894972 (1975-07-01), Narayan
patent: 3909465 (1975-09-01), Wiedermann

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